More information surfaced on Monday that raised additional questions in the Russia probe, and how the real collusion may actually tie to the Obama administration.

Susan Rice, who served as Obama’s security adviser, sent a head-scratching email to herself the day Trump was sworn into office. The email documents Obama’s guidance at a high-level meeting about how law enforcement should investigate Russian interference in the 2016 presidential race.

According to Senate Judiciary Committee Chairman Chuck Grassley and Sen. Lindsey Graham, the partially unclassified email was sent by Rice on Jan. 20, 2017 — and appears to document a Jan. 5 meeting that included Obama, then-FBI Director James Comey, then-Deputy Attorney General Sally Yates, then-Vice President Joe Biden and Rice.

“President Obama began the conversation by stressing his continued commitment to ensuring that every aspect of this issue is handled by the Intelligence and law enforcement communities ‘by the book.’ The president stressed that he is not asking about, initiating or instructing anything from a law enforcement perspective. He reiterated that our law enforcement team needs to proceed as it normally would by the book,” her email reads.

The email also appears to reflect Obama’s guidance on sharing sensitive information with both the Russians and the incoming administration.

“He wants to be sure that, as we engage with the incoming team, we are mindful to ascertain if there is any reason that we cannot share information fully as it relates to Russia,” the email continues. “The President asked Comey to inform him if anything changes in the next few weeks that should affect how we share classified information with the incoming team. Comey said he would.”

Grassley, R-Iowa, and Graham, R-S.C., released the email Monday. They said they uncovered it as part of their oversight of the FBI and the Department of Justice, and claimed it raises new questions.

The senators asked Rice to answer questions about the email by Feb. 22.